<script lang="ts" setup name="HomeCategory">
import useStore from '../../../store';
import { ref, computed } from 'vue';
const { category } = useStore()

// 实现思路：
// 1：鼠标进入某个li,记录id
// 2：根据记录的id，动态的获取需要展示layer goods 数据
const categoryId = ref('')
const handleEnter = (id: string) => {
    if (!id) return
    categoryId.value = id
    console.log(categoryId.value)
}

const goods = computed(() => {
    const itemObj = category.list.find(item => item.id === categoryId.value)
    return itemObj?.goods
})

</script>
<template>
    <div class="home-category" @mouseleave="categoryId = ''">
        <!-- 菜单 -->
        <ul class="menu">
            <li @mouseenter="handleEnter(item.id)" :class="{ active: item.id === categoryId }"
                v-for="(item, index) in category.list" :key="index">
                <RouterLink to="/">{{ item.name }}</RouterLink>
                <!-- 提供的假数据，没有children 后台返回的数据，万一没有children 也会报错 -->
                <!-- template 是vue内置的模板标签，不会渲染任何解构，只是用于划分结构块，v-if -->
                <template v-if="item.children">
                    <RouterLink v-for="sub in item.children?.slice(0, 2)" :key="sub.id" to="/">
                        {{ sub.name }}
                    </RouterLink>
                </template>

                <template v-else>
                    <XtxSkeleton :width="60" :height="18" style="margin-right: 5px" bg="rgba(255,255,255,0.2)"
                        animated />
                    <XtxSkeleton :width="50" :height="18" style="margin-right: 10px" bg="rgba(255,255,255,0.2)" animated />
                </template>
            </li>
        </ul>

        <!-- 所有共用一个弹层 -->
        <div class="layer" v-if="goods">
            <h4>分类推荐 <small>根据您的购买或浏览记录推荐</small></h4>
            <ul>
                <li v-for="item in goods" :key="item.id">
                    <RouterLink :to="`/product/${item.id}`">
                        <img :src="item.picture" alt="">
                        <div class="info">
                            <p class="name ellipsis-2">{{ item.name }}</p>
                            <p class="desc ellipsis">{{ item.desc }}</p>
                            <p class="price"><i>¥</i>{{ item.price }}</p>
                        </div>
                    </RouterLink>
                </li>
            </ul>
        </div>
    </div>
</template>

<style scoped lang="less">
.home-category {
    width: 250px;
    height: 500px;
    background: rgba(0, 0, 0, 0.8);
    position: relative;
    z-index: 99;

    .menu {
        li {
            padding-left: 40px;
            height: 55px;
            line-height: 55px;

            // &:hover 鼠标在li上时，对应li正常高亮（辅助高亮）
            // &.active 鼠标悬停到对应盒子，根据id也要让对应的li高亮
            &:hover,
            &.active {
                background: @xtxColor;
            }

            a {
                margin-right: 4px;
                color: #fff;

                &:first-child {
                    font-size: 16px;
                }
            }
        }
    }

    // .... 问题：你有个样式，被影响了，结果不知道是谁影响的
    .layer {
        width: 990px;
        height: 500px;
        background: rgba(255, 255, 255, 0.8);
        position: absolute;
        left: 250px;
        top: 0;
        display: none;
        padding: 0 15px;

        h4 {
            font-size: 20px;
            font-weight: normal;
            line-height: 80px;

            small {
                font-size: 16px;
                color: #666;
            }
        }

        ul {
            display: flex;
            flex-wrap: wrap;

            li {
                width: 310px;
                height: 120px;
                margin-right: 15px;
                margin-bottom: 15px;
                border: 1px solid #eee;
                border-radius: 4px;
                background: #fff;

                &:nth-child(3n) {
                    margin-right: 0;
                }

                a {
                    display: flex;
                    width: 100%;
                    height: 100%;
                    align-items: center;
                    padding: 10px;

                    &:hover {
                        background: #e3f9f4;
                    }

                    img {
                        width: 95px;
                        height: 95px;
                    }

                    .info {
                        padding-left: 10px;
                        line-height: 24px;
                        width: 190px;

                        .name {
                            font-size: 16px;
                            color: #666;
                        }

                        .desc {
                            color: #999;
                        }

                        .price {
                            font-size: 22px;
                            color: @priceColor;

                            i {
                                font-size: 16px;
                            }
                        }
                    }
                }
            }
        }
    }

    &:hover {
        .layer {
            display: block;
        }
    }
}
</style>
